Explore BrainMass

Explore BrainMass

    Balancing chemical equations and calculating yield.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    When baking soda (sodium bicarbonate or sodium hydrogen carbonate, NaHCO3) is heated, it releases carbon dioxide gas, which is responsible for the rising of cookies, donuts, and bread. The balanced equation for this process is: 2NaHCO3 ® Na2CO3 + H2O + CO2. Calculate the mass of NaHCO3 required to produce 20.5 g of CO2.

    Please see the attached file.

    Which of the following equations is balanced?
    a. CO2 + 2KOH ® K2CO3 + 2H2O
    b. CH4 + 2O2 ® CO2 + 2H2O
    c. Be2C + H2O ® 2Be(OH)2 + CH4
    d. Cu + 2HNO3 ® Cu(NO3)2 + NO + H2O
    Which of the following equations is balanced?
    a. 2Mg + O2 ® 2MgO
    b. O3 ® 3O2
    c. 2H2O2 ® H2O + O2
    d. N2 + 3H2 ® 3NH3
    The fertilizer ammonium sulfate [(NH4)2SO4] is prepared by the reaction between ammonia (NH3) and sulfuric acid:
    2NH3(g) + H2SO4(aq) ® (NH4)2SO4(aq)
    How many kilograms of NH3 are needed to produce 1.00 ´ 105 kg of (NH4)2SO4?
    a. 1.70 ´ 104 kg
    b. 3.22 ´ 103 kg
    c. 2.58 ´ 104 kg
    d. 7.42 ´ 104 kg
    When baking soda (sodium bicarbonate or sodium hydrogen carbonate, NaHCO3) is heated, it releases carbon dioxide gas, which is responsible for the rising of cookies, donuts, and bread. The balanced equation for this process is: 2NaHCO3 ® Na2CO3 + H2O + CO2. Calculate the mass of NaHCO3 required to produce 20.5 g of CO2.
    a. 8.38 g
    b. 78.3 g
    c. 157 g
    d. 39.1 g

    © BrainMass Inc. brainmass.com March 4, 2021, 9:46 pm ad1c9bdddf
    https://brainmass.com/chemistry/acids-and-bases/balancing-chemical-equations-calculating-yield-269966

    Attachments

    Solution Preview

    The solution is attached below in two files. the files are identical in content, only differ in format. The first is in MS Word format, while the other is in Adobe pdf format. Therefore you can choose the format that is most suitable to you.

    1.
    The reaction is imbalanced.
    On the LHS we have 4 oxygen atoms, while on the RHS there are 5 oxygen atoms (3 from K2CO3 and 2 from the )
    The reaction is balanced. There are one ...

    Solution Summary

    The 4 pages solution shows how to solve the three problems dealing with chemical reactions equations and how to obtain the needed results.

    $2.49

    ADVERTISEMENT